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' hanger stirrups 13 secured, at their Watentetl ihpri dd Wild.

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application filed 1t ovemhcr To all whom it may concerns" Be it knownthat l, WiLniaM ll. MURRAY, a citizen of the United @tates, and aresident of'llllamaroneck, in the county of West chester and State ofNew York, have in vented a new and linproved @caffold, of which thefollowing is a description.

My invention relates to scaffolds adapted to be suspended on a buildingto be raised or lowered as desired.

The general object of my invention is to provide a novel raising andlowering means of simple construction adapted to wind in and pay out thesuspending ropes or cables in the raising and lowering of the scaffold,the invention having in view especially to promote convenience in theoperation of raising and lowering the scaffold and to insure safety andpositively and automatically? 4,29. 'lihe drive 28 and said shaft isadapted to have axial preventing the accidental dropping of the scaffoldat one or hothends.

The nature of the invention and its distinctive features and advantageswill more clearly appear as the description proceeds.

Reference is to he had to the accompanying drawings forming a part ofthis specification, it being understood that the drawings are merelyillustrative of one example of the invention.

F igure 1 is a front elevation of a scaffold suspended from the roof:

l igure Q is an enlarged side elevation of the raising and loweringmeans, the scaffold proper being in transverse vertical section;

Figure 3 is an elevation at right angles to Figure Q;

ll igure dis a detail in vertical section adjacent to one end of thedrum operating shaft.

' in carrying out my invention the platform of the scaffold any approvedform, here shown as comprising a ladder 11 having planks laid on theladder rungs 12. 'lhe platform 10 rests in upper ends by bolts 14 to theparallel terminals 15 on the frames 16 of the hoisting and lower ingunits.

sits the two hoisting and lowering units of the scaffold are alilre, itwill sudice to describe one. Each hanger stirrup 13 is formed from stripmetal the sides of which in practice may be of are upwardly convergentand the upper tor are parallel and receive a minals of which transversebolt ll having a lever nut 18 for lit, ltlill. ilerial lilo. hlllfill t.

tightly clamping the sides of the hanger against thebolts 1t which lieabove and below the bolt 17 at right angles thereto.

The suspension cables 19 are here shown its having hooks 20 at theirupper ends to hoolr over a cornice it. lit will be understood that anyexpedient may be adopted for fastening the upper ends of the suspensioncables. Each cable 19 runs over an idler sheave 21 on a shaft or tie rod22 at the up per end of the frame 16 and from said sheave to a windingdrum 2?, the shaft 24tof which is tnrnahly mounted in said frame 160 tlnthe drum shaft is a gear wheel 25 over which advantageously a housing 26may he provided on frame 16. The gear wheel 25 meshes with a drivepinion 2'? on a counter shaft Q8 having hearings in the frame 16, saiddrive shaft 28 having a cranlr handle pinion 2'?! is fast on the shaftinovement in the frame 16 in addition to its turning movement whereby anaxial movement of the shaft will shift the pinion 27 thereof into or outof engagement with a clutch 32'fixedly secured by rivets 33 or the liketo the frame 16, said clutch and said pinion 27 having mating clutchteeth 31 it compression spring is coiled about the shaft 28 at a side ofthe frame opposite the clutch 32, the said spring abutting at one endagainst the frame and abutting at its other end against the collar 30"on the shaft 528 so that the spring tends to maintain the shaft inposition with the pinion 27 engaging the clutch 32 to prevent turning ofthe shaft 28 and thereby preventing turning of the drum Turning with thedrum shaft 24L is a ratchet wheel 34 engaged by a pawl 35 for preventingretrograde movement. Thus, the pawl 35 will hold the drum againstturning after the pinion 27 is released from the c utch but will slipover the ratchet 34L in the turning of the drum in response to theturning of the .drive shaft 28 and pinion 27. v

it would state in conclusion that while the illustrated exampleconstitutes a practical embodiment of my invention, l do not limitmyself strictly to the exact details herein illustrated, since,manifestly. the same can be considerably varied without departure fromthe spirit of the invention as d fined n the appended claims.

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llllll lllli lltl ing to maintain said pinion in engagement with saidclutch.

2. ln a Windlass of the character 'de- 15 scribed, a frame, a drumrevolubly carried by said frame, a driven gear on said drum, a driveshaft carrying a pinion meshing with said gear revolnble and movableaxially in said frame, and fixed clutch members on 20 said frameengageable and disengageable by said pinion by an axial movement of thedrive shaft;

' WILLIAM J. MURRAY.

